TeleGeography: Ethernet VPLS, EoDWDM interest grows, while IP/VPN expansion dips
HISTORICAL SPACE FREQUENCIES. The first satellite to orbit the Earth was Sputnik 1, launched by the Soviets in October 1957. It carried two radio beacons on frequencies of 20.005 and 40.01 MHz. The Soviets continued to use frequencies around 20 MHz and even some around 15 MHz for many subsequent missions. This tends to be used for uplinks of the satellites that downlink in the 137 - 138 MHz band. 2  149.95 - 150.05 MHz. 3  This is used by satellites providing positioning, time and frequency services, by ionospheric research and other satellites.
GPS satellites orbit at a height of about 12,000 miles (19,300 km) and orbit the earth once every 12 hours. About 24 GPS satellites orbit the earth every 12 hours. These satellites are traveling around the earth at speeds of about 7,000 mph (11,200 kph).GPS satellites are powered by solar energy.They have backup batteries onboard to keep them running in the event of a solar eclipse, when there's no solar power.f the geostationary satellites were moving, they would have to move at a speed of about 7,000 mph to maintain a stationary orbit above a fixed point on the earth. That is about the same speed as the GPS satellites that orbit the earth twice a day.